Shrimp

1. Combine all the ingredients together in a medium-sized bowl 
2. Mix until well combined and set aside until use

Rice Rolls

1. Combine the rice flour, cornstarch, potato starch, water, salt and oil in a large jug and whisk until well combined
2. Meanwhile, prepare a large wok/pot or steamer that fits a plate
3. Brush the plate with a thin layer of oil
4. Fill the wok/pot/steamer with a couple inches of water
5. Place the plate over a small bowl in the wok/pot, or inside the steamer
6. Close the lid and heat until the water is boiling
7. Uncover and pour the rice roll batter onto the plate, pour just enough to cover the base of the pan in a thin layer, tilting to spread it out more easily
8. On one side of the rice roll place 4 shrimp in a row
9. Cover the lid and steam for 4 minutes, or until cooked through
10. Uncover and using a scraper or spatula carefully roll the rice noodle from the shrimp side
11. Lift it from the pan and place it on your serving plate
12. Repeat with the remaining batter and prawns 

Sauce

1. Combine the soy sauce, yum yum, sugar, and sesame oil in a jug or small bowl
2. Heat it in the steamer for a few minutes, or in the microwave until warm
3. Pour over the rice rolls to serve